I am partial to Macs. I'm using one now and have been for over 15 years. Macs are much more intuitive to use (except for maybe "right clicking" on a mouse). Even my wife who is computer illiterate can use a Mac.
As for PCs, the best example of why I think they are difficult to use is: When you want to turn your PC off, why do you have to go to the "Start" button? What the heck is this "Alt+F1" stuff?